Aura on Android: Making it possible to generate GN build configuration

chrome/browser/ui/views/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
 
-assert(!is_android)
+assert(toolkit_views)
 
 component("views") {
   output_name = "browser_ui_views"
   sources = [
     "accelerator_table.cc",
     "accelerator_table.h",
     "browser_dialogs.h",
     "chrome_views_export.h",
     "event_utils.cc",
     "event_utils.h",
@@ skipping 14 matching lines @@
     "//ui/events",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//url",
   ]
 
   if (use_ash) {
     deps += [ "//ash" ]
   }
 }